Career Chip

Professor Farnsworth replaced the entire Planet Express crew's career chips with the chips of the old crew from a package labeled "Contents of Space Wasp's Stomach", A foreshadowing of a much later episode The Sting. (Noted by anteaters)

A Quantum Finish

When the Professor's horse loses upon examination of the finish line with an electron microscope, the god Farnsworth decries his loss with "no fair! You changed the outcome by measuring it!". (see "Heisenberg Uncertainly Principle" if you don't get it)

Taxicab Numbers

In mathematics, a Taxicab number is defined as the smallest number that can be expressed as a sum of two positive algebraic cubes in n distinct ways. 1729 was made famous by an incident involving mathematicians G. H. Hardy and Srinivasa Ramanujan who showed that 1729 was not dull. A taxicab in Bender's Big Score is the number 87539319, which is the sum of two positive cubes in 3 ways.

"Tasty Human Burgers"

Alienese is one of the three languages that the writers created from scratch, and which the viewers worked out from only the letter from drink in "Drink Slurm", context and letter frequency. (Later revealed here http://i.imgur.com/5wVUGwI.jpg ) In one opening title, the Alienese reads "Thanks for watching, Futurama slave army!" (http://i.imgur.com/D8mWpPq.png )